Comparison of discriminative properties among disease-specific questionnaires for measuring health-related quality of life in patients with chronic obstructive pulmonary disease
Abstract
Three disease-specific, health-related quality of life (HRQL) questionnaires have been introduced to assess patients with chronic obstructive pulmonary disease (COPD): the St. George's Respiratory Questionnaire (SGRQ), the Breathing Problems Questionnaire (BPQ), and the Chronic Respiratory Disease Questionnaire (CRQ). The purpose of the present study was to make comparisons between the SGRQ, the BPQ, and the CRQ in their discriminative properties, and to clarify the characteristics of each questionnaire. One hundred forty-three patients with mild to severe COPD completed pulmonary function tests, progressive cycle ergometer testing for exercise capacity, assessment of dyspnea, anxiety, and depression, and assessment of HRQL. The frequency distributions of the questionnaire scores showed that the SGRQ and the CRQ were normally distributed and that the BPQ was skewed toward low scores. Relationships between all dimensions of the three questionnaires were significant (correlation coefficients [Rs] = 0.74 to 0.86). The three questionnaires had significant but weak correlations (Rs = -0.24 to -0.36) with some physiologic variables (VC, FEV1, and DL(CO)/VA) and mild to moderate correlations with exercise capacity and assessment of dyspnea, anxiety, and depression. Stepwise multiple regression analyses revealed that the Baseline Dyspnea Index (BDI) score, anxiety by the Hospital Anxiety Depression Scale (HAD), and maximal oxygen uptake (VO2max) accounted for 61% of the variance in the SGRQ and that the BDI and anxiety of the HAD accounted for 53 and 49% of the variance in the BPQ and the CRQ, respectively. Dyspnea and psychologic status impacted the HRQL in patients with COPD. Although no substantial differences between the SGRQ, the BPQ, and the CRQ were evident in the correlations with physiologic parameters and the influential factors, the BPQ was found to be less discriminatory than the SGRQ and the CRQ in evaluating HRQL cross-sectionally.
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The diagnosis of COPD is often made only after patients present with symptoms that have demanded a change in lifestyle and a reduction in quality of life.
“The diagnosis of COPD is often made only after patients present with symptoms that have demanded a change in lifestyle and a reduction in quality of life.75”
From Anxiety and Depression in COPD (2008) · cites this paper as [75]
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- Authors
- HAJIRO, T., NISHIMURA, K., TSUKINO, M., IKEDA, A., KOYAMA, H., & IZUMI, T.
- Affiliations
- Kyoto University (JP)
- Venue
- American Journal of Respiratory and Critical Care Medicine
- Publisher
- Oxford University Press (OUP)
- Published
- 1998-03-01
- Volume
- 157
- Issue
- 3
- Pages
- 785-790
- ISSN
- 1073-449X (ISSN-L)
- 1535-4970
- OpenAlex
- W2071805440
- Cited by
- 265
- References
- 21
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 2 · 2023: 8 · 2021: 8 · 2020: 7 · 2019: 6 · 2018: 6 · 2017: 11 · 2016: 8 · 2015: 8 · 2014: 13 · 2013: 14 · 2012: 14
- FWCI
- 7.36
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- American Journal of Respiratory and Critical Care Medicine (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Chronic Obstructive Pulmonary Disease (COPD) Research
- Social Sciences › Economics, Econometrics and Finance › Economics and Econometrics › Health Systems, Economic Evaluations, Quality of Life
- Health Sciences › Medicine › Physiology › Asthma and respiratory diseases
- Keywords
- chronic obstructive pulmonary disease, health-related quality of life, disease-specific questionnaire, St George's Respiratory Questionnaire, Chronic Respiratory Questionnaire, dyspnea, anxiety, depression, exercise capacity, VO2max, lung function
- MeSH terms
- Aged, Aged, 80 and over, Anxiety, Cross-Sectional Studies, Depression, Dyspnea, Evaluation Studies as Topic, Exercise Test, Forced Expiratory Volume, Health Status, Humans, Lung Diseases, Obstructive, Middle Aged, Oxygen Consumption, Pulmonary Diffusing Capacity, Quality of Life, Surveys and Questionnaires, Regression Analysis, Respiration, Respiratory Function Tests, Vital Capacity, Discriminant Analysis, Exercise Tolerance
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